Torre de Torreciudad is a historic medieval fortress situated at the junction of the Cinca and Ésera rivers in Secastilla, Huesca, Aragon. First documented in 1066 and later designated a Cultural Heritage Asset of Aragón, the tower served as a strategic Christian frontier line during the medieval period. The distinctive circular tower, approximately 6.6 meters in diameter and originally standing around 12 meters high, features small stone construction with an estimated thickness of 2 meters across what were likely four floors. Although substantially ruined, with its western side now lost, the surviving structure stands as a testament to 11th-century military architecture and the region's complex frontier history.